CN115208955B - Method, device, computer equipment and medium for processing resource request - Google Patents
Method, device, computer equipment and medium for processing resource request Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
- H04L67/63—Routing a service request depending on the request content or context
Abstract
The invention relates to a method for processing a resource request, which is applied to a first edge node of a content distribution network, and comprises the following steps: receiving a resource request of a client; judging whether the resource requested by the resource request exists in the first edge node or not; when the resource does not exist, judging the type of the resource; when the resource is of a first type, determining a second edge node by the first edge node, and returning a first response message of the resource request to the client by the first edge node, wherein the first response message is used for indicating the client to send an adjusted resource request to the second edge node, and the first response message of the resource request returned by the first edge node to the client comprises address information of the second edge node; when the resource is the second type resource, the first edge node acquires the resource from the upper node or the source station and returns the resource to the client. By adopting the method of the invention, the hit rate of the resource request at the edge node is improved, and the source return rate is effectively reduced.
Description
Technical Field
The present invention relates to the field of content distribution networks, and in particular, to a method and system for processing a resource request.
Background
The full name of CDN is Content Delivery Network, the content delivery network. The CDN is an intelligent virtual network constructed on the basis of the existing network, and by means of the edge servers deployed in various places, a user can obtain required content nearby through load balancing, content distribution, scheduling and other functional modules of the center platform, so that network congestion is reduced.
The CDN hit rate refers to the probability of hitting the cache when the user accesses. The architecture of the CDN is a multi-layer cache aggregate structure, wherein the first layer is an edge node, the middle is composed of one or more layers of father nodes, and the last layer is a source station. In the related art, a client accesses to a CDN edge node through DNS analysis at random, when a request content is not hit, the edge node forwards the request to an upper parent node, the parent returning cost is increased, and the problems of high CDN source returning rate, internal consumption bandwidth, poor network performance, large time delay and the like are caused, so that the overall performance of the CDN is directly influenced, and the user experience is poor.
Disclosure of Invention
In order to overcome the problems in the related art, the invention provides a method, a device, computer equipment and a medium for processing a resource request.
According to a first aspect of an embodiment of the present invention, there is provided a method of resource request processing, applied to a first edge node of a content distribution network, the method comprising:
The first edge node receives a resource request of a client;
The first edge node judges whether the resource requested by the resource request exists in the first edge node or not;
when the resource does not exist, the first edge node judges the type of the resource;
When the resource is a first type resource, determining a second edge node by the first edge node, wherein the first edge node returns a first response message of the resource request to the client, and the first response message is used for indicating the client to send an adjusted resource request to the second edge node, and the first response message of the first edge node returning the resource request to the client comprises address information of the second edge node;
and when the resource is a second type resource, the first edge node acquires the resource from an upper node or a source station and returns the resource to the client.
The first edge node judges the type of the resource, which comprises the following steps:
When the access times of the resources in the preset time are smaller than a first preset threshold value corresponding to the address information contained in the resource request, judging that the resources are of a first type;
And judging the resource as the second type resource when the access times of the resource in the preset time are larger than or equal to a first preset threshold corresponding to the address information contained in the resource request.
The access times of the resources in the preset time include:
and the access times of the resource at the first edge node in the preset time and/or the total access times of the resource at the edge node group in the area where the client is located in the preset time.
The first preset threshold is set according to a historical access condition of the first edge node to address information contained in the resource request, and/or is set according to a historical access condition of the edge node group in the area where the client is located to address information contained in the resource request.
Wherein the first edge node determines a second edge node, comprising:
The first edge node determines a resource identifier according to the resource request;
The first edge node performs consistent hash calculation on the resource identifier to generate a hash value of the resource, wherein the resource identifier comprises a uniform resource locator or a domain name;
the first edge node calculates hash values of all or part of edge nodes in the area where the first edge node is located, and the hash values of all the edge nodes are distributed on a consistent hash ring;
and the first edge node determines the corresponding second edge node on the consistent hash ring according to the hash value of the resource.
Wherein after the first edge node determines the second edge node, the method further comprises:
And the first edge node records the second edge node, and when the resource request for accessing the same resource is received again and the resource is a first type resource, the first edge node returns a first response message of the resource request to the client side, wherein the first response message comprises the recorded address information of the second edge node.
Wherein the first edge node determines the second edge node, further comprising:
And determining the second edge node according to the load condition of each edge node in the edge node group where the first edge node is located.
Before the first edge node determines the type of the resource, the method further includes:
the first edge node judges whether the self load is larger than or equal to a second preset threshold value;
And if not, the first edge node judges the resource type of the resource.
Wherein the method further comprises:
If yes, the first edge node determines a third edge node, and the first edge node returns a second response message of the resource request to the client;
the second response message is used for indicating the client to send the adjusted resource request to the third edge node.
Wherein the method further comprises:
And directly returning the resource to the client under the condition that the resource exists in the first edge node.
The first response message is used for indicating the client to send an adjusted resource request to the second edge node, so that the second edge node returns a resource requested by the adjusted resource request to the client, and the resource is a resource with a key frame position closest to the system time of the adjusted resource request reaching the second edge node as a starting position.
According to a second aspect of an embodiment of the present invention, there is provided an apparatus for processing a resource request, applied to a first edge node of a content distribution network, the apparatus comprising:
The receiving module is used for receiving the resource request of the client;
The judging module is used for judging whether the resource requested by the resource request exists in the first edge node or not; when the resource does not exist, the judging module judges the type of the resource;
The determining module is used for determining a second edge node when the judging module judges that the resource is a first type resource;
The response module is used for returning a first response message of the resource request to the client when the judging module judges that the resource is a first type resource, wherein the first response message is used for indicating the client to send an adjusted resource request to the second edge node, and the first response message of the resource request returned to the client by the response module comprises address information of the second edge node;
And the response module is also used for acquiring the resource from an upper node or a source station and returning the resource to the client when the judging module judges that the resource is the second type resource.
The judging module is specifically configured to:
When the access times of the resources in the preset time are smaller than a first preset threshold value corresponding to the address information contained in the resource request, judging that the resources are of a first type;
And judging the resource as the second type resource when the access times of the resource in the preset time are larger than or equal to a first preset threshold corresponding to the address information contained in the resource request.
The access times of the resources in the preset time include:
and the access times of the resource at the first edge node in the preset time and/or the total access times of the resource at the edge node group in the area where the client is located in the preset time.
The first preset threshold is set according to a historical access condition of the first edge node to address information contained in the resource request, and/or is set according to a historical access condition of the edge node group in the area where the client is located to address information contained in the resource request.
Wherein the determining module is further used for determining,
The determining module determines a resource identifier according to the resource request;
the determining module performs consistent hash calculation on the resource identifier to generate a hash value of the resource, wherein the resource identifier comprises a uniform resource locator or a domain name;
the determining module calculates hash values of all or part of edge nodes in the area where the first edge node is located, and distributes the hash values of all the edge nodes on a consistency hash ring;
And the determining module determines the corresponding second edge node on the consistent hash ring according to the hash value of the resource.
Wherein the response module is also used for controlling the display device,
And the response module records the second edge node, and when the resource request for accessing the same resource is received again and the resource is a first type resource, the response module returns a first response message of the resource request to the client side, wherein the first response message comprises the recorded address information of the second edge node.
Wherein the determining module is further used for determining,
The determining module determines the second edge node according to the load condition of each edge node in the edge node group where the first edge node is located.
Wherein, the judging module is also used for judging whether the current state of the current state is the current state,
The judging module judges whether the load of the first edge node is larger than or equal to a second preset threshold value;
and if not, the judging module judges the resource type of the resource.
Wherein, if the judging module judges that the judgment is yes,
The determining module is further configured to determine a third edge node;
The response module is further configured to, when the judgment module judges that the request is yes, return a second response message of the resource request to the client; the second response message is used for indicating the client to send the adjusted resource request to the third edge node.
Wherein the response module is used for receiving the response signal,
And under the condition that the judging module judges that the resource exists in the first edge node, the response module directly returns the resource to the client.
The first response message is used for indicating the client to send an adjusted resource request to the second edge node, so that the second edge node returns a resource requested by the adjusted resource request to the client, and the resource is a resource with a key frame position closest to the system time of the adjusted resource request reaching the second edge node as a starting position.
According to a third aspect of an embodiment of the present invention, there is provided a computer apparatus comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute executable instructions in the memory to implement the method according to any of the first aspects.
According to a fourth aspect of embodiments of the present invention, there is provided a non-transitory computer readable storage medium having stored thereon executable instructions which, when executed by a processor, implement the method according to the first aspect.
The technical scheme provided by the embodiment of the invention can comprise the following beneficial effects: by adopting the method for processing the resource request, the hit rate of the resource request at the edge node can be improved, the parent returning cost is effectively reduced, the internal consumption bandwidth is reduced, and the utilization efficiency of the CDN edge node is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic flow chart diagram illustrating a method of resource request processing according to an exemplary illustration;
FIG. 2 is a block diagram of an apparatus for resource request processing according to an exemplary illustration;
FIG. 3 is a block diagram of a computer device, according to an example embodiment.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.
Fig. 1 is a schematic flow chart of a method for processing a resource request according to an exemplary embodiment of the present application.
As shown in fig. 1, the method for processing a resource request according to the present invention is applicable to a first edge node of a content distribution network, and includes:
step 101, a first edge node receives a resource request sent by a client;
In some exemplary embodiments, the client may be a terminal device such as a desktop computer, a notebook computer, a smart phone, or an IOT device, or may be a server device such as a conventional server, a cloud server, or a server array, or may refer to a program running on the client. After receiving the resource request sent by the client, the dispatching center node in the content distribution network dispatches the request to a first edge node in the content distribution network, and in the content distribution network, the edge node receiving the resource request from the client is defined as the first edge node.
The resource request received by the first edge node at least comprises a resource identifier and a client identifier. The resource identifier may be a uniform resource locator or a domain name, a name of a resource, etc., and the resource requested by the client can be determined according to the resource identifier. The client identification may be client address information, client type, client ID, etc.
Step 102, the first edge node judges whether the resource requested by the resource request exists in the first edge node;
In some exemplary embodiments, when receiving a resource request from a user, the first edge node obtains a resource identifier in the resource request, and the first edge node queries whether the resource requested by the client exists locally, and if so, the first edge node directly returns the resource to the client.
Step 103, when no resource exists, the first edge node judges the type of the resource;
In some exemplary embodiments, when the first server determines that there is no (missed) resource locally, the first edge node determines the type of resource. In one embodiment of the present invention, the types of the resources may be distinguished according to the resource format, the protocol type of the resource request, the size of the resource file, the channel to which the resource belongs, the resource access heat, etc.; the types of the resources are judged in different modes, so that different customer demands can be met, for example, a customer can divide the resources into hot channel resources and general channel resources according to the demands of content operation, and the CDN manufacturer can grasp the processing modes of different contents more accurately through the division.
In one embodiment of the present invention, the resource type matching table may be deployed on the edge node in advance, and/or a preset threshold may be preset for determining the resource type. In one embodiment of the invention, the resource types can be distinguished by the resource access heat, and the resource types can be judged by comparing the number of times of accessing the resource with a first preset threshold value which is preset and used for judging the resource access heat.
In one embodiment of the present invention, when the number of accesses to the resource in the preset time is less than a first preset threshold corresponding to the address information included in the resource request, the resource is determined to be a first type resource; and when the access times of the resources in the preset time are greater than or equal to a first preset threshold value corresponding to the address information contained in the resource request, judging that the resources are the second type resources. The address information included in the resource request may be information such as domain name, IP, URL, etc. associated with the resource carried in the resource request, and the first preset threshold at least includes the following two setting manners:
firstly, performing manual pre-estimation setting according to the service characteristics of domain names;
The second mode is that setting is carried out according to the historical access condition of the domain name carried by the resource request on the first edge node, and/or setting is carried out according to the historical access condition of the domain name carried by the resource request on the edge node group in the area where the client is located;
the first preset threshold values for different domain names are obtained by counting the access times of the edge node for different domain names in the historical time and calculating based on experiences of a person skilled in the art and any well-known algorithm or through a machine learning mode, so that the resource types can be classified more accurately, and finer granularity bandwidth control can be achieved at the edge node.
The number of the upper layer nodes or the source stations of the resources in the area where the client is located can be controlled by counting the total access times of the edge node groups in the area where the client is located in the history time for different areas and calculating to obtain the first preset threshold values for different domain names based on experiences of persons skilled in the art and any well-known algorithm or through a machine learning mode, so that resources of a certain type are aggregated or dispersed based on the characteristics of a certain area, and the overall internal consumption bandwidth is reduced.
The method comprises the steps of respectively setting corresponding preset thresholds by counting the access times of edge nodes for different domain names in historical time and the total access times of edge node groups in an area where a client is located for different areas in historical time, comparing the two preset thresholds based on experience of a person skilled in the art and any algorithm or machine learning mode which is well known, and selecting a smaller preset threshold as a first preset threshold, so that bandwidth control with finer granularity and the quantity of control resources for returning to an upper node or a source station in the edge node group where the client is located are simultaneously considered. The historical time may be set manually according to actual conditions, and specifically may be one month in the past, one year in the past, or all of the past, which is not specifically limited in this embodiment.
Step 104, when the resource is determined to be the first type resource, the first edge node determines the second edge node, and the first edge node returns a first response message of the resource request to the client, where the first response message is used to instruct the client to send the adjusted resource request to the second edge node, and the first response message of the resource request returned by the first edge node to the client includes address information of the second edge node.
In some exemplary embodiments, when the first edge node determines that the resource requested by the user is a first type of resource, the first edge node determines a second edge node, including: the first edge node acquires an edge node group corresponding to the area to which the client belongs and a resource identifier in a resource request; the first edge node determines a second edge node in the edge node group based on the resource identification, and the first edge node sends a response message of the resource request to the client, wherein the response message of the resource request returned by the first edge node to the client comprises address information of the second edge node, and/or the identification information of the second edge node, so that the client can send an adjusted resource request to the second edge node, and further acquire resources requested by the client from the second edge node.
And 105, when the resource is the second type resource, the first edge node acquires the resource from the upper node or the source station and returns the resource to the client.
Specifically, when the first edge node determines that the resource is a second type resource, that is, in this embodiment, when the resource requested by the client is a resource with higher access heat, the first edge node obtains the resource through an upper node, and when the upper node does not have the resource or does not have the upper node, the first edge node obtains the resource through a source return to the client.
In one embodiment of the present invention, before the first edge node determines the type of the resource in step 102, the method further includes: the first edge node judges whether the self load is larger than or equal to a second preset threshold value; if yes, the first edge node determines a third edge node with the resource requested by the resource request in the area of the first edge node according to the resource identifier of the resource request, and returns a second response message of the resource request to the client, so that the client sends the adjusted resource request to the third edge node; if not, the first edge node further judges the resource type.
When the load of the first edge node is larger than or equal to a second preset threshold value, the first edge node is larger, and cannot quickly respond to the resource request sent by the client, in order to improve user access experience and achieve the purpose of quickly responding to the resource request, the first edge node determines that a third edge node of the resource requested by the resource request exists in the area to which the resource request belongs according to the resource identifier of the resource request, and sends a second response message containing address information of the third edge node to the client, so that the client can send the adjusted resource request to the third edge node according to the second response message. When the load of the first edge node is smaller than a second preset threshold value, the load of the first edge node is smaller, so that the resource request of the user can be responded quickly, and the first edge node can further judge the resource type of the resource.
In one embodiment of the present invention, in step 103, further, the first edge node determines the type of the resource by counting the number of accesses to the resource in a preset time, where the number of accesses to the resource in the preset time includes: the number of access times of the resource to the first edge node in the preset time and/or the total number of access times of the resource to the edge node group in the area where the client is located in the preset time are specifically as follows:
Firstly, acquiring a resource identifier in a resource request; determining the total access times of the resources on the first edge node in preset time according to the resource identification;
Determining a region to which the client belongs and a resource identifier in the resource request, and acquiring an edge node group corresponding to the region to which the client belongs based on the region to which the client belongs; and acquiring the total access times of the edge node group to the resource in the preset time according to the resource identification, wherein the total access times are the sum of the access times of the edge node group to the resource in the preset time.
In practical application, the edge node can determine the resource requested by the user according to the resource identifier in the resource request, so as to obtain all resource requests aiming at the resource, and it should be noted that each edge node in each area can locally count the access times of the resource according to a preset acquisition period (for example, 1 minute), and further upload the respective access times to the dispatching center node, or the dispatching center node obtains the access times from each edge node at regular time.
In the first embodiment, when the first edge node receives the resource request of the user, the total access times of the first edge node for the resource may be counted locally within a preset time, for example, the total access times of the first edge node for the resource may be counted within 5 minutes, where the preset time may be the first 5 minutes, the first 10 minutes, and the like taking the current time of receiving the resource request of the user as the end point, and the collection period and the duration of the preset time are not limited specifically herein.
In the second mode, the first edge node obtains the client identifier of the resource request, determines the region to which the client belongs according to the client identifier, and further obtains the edge node group corresponding to the region to which the client belongs. In practical applications, the first edge node may query, according to the identifier of the client, or through the information of the area to which the client belongs, an edge node group corresponding to the area to which the client belongs.
Specifically, the first edge node may count and acquire the total access times of the edge node group to the resource through the first edge node itself, and may also directly acquire the total access times from the dispatching center node.
Specifically, the dispatching center node obtains the access times of the resource in each edge node, the dispatching center node counts the access times of all the edge nodes in each area to the resource according to a preset statistical period (for example, 1 minute), then synchronizes the access times of all the edge nodes to the resource to each edge node in the corresponding area according to a preset synchronization period (for example, 1 minute), and the first edge node only needs to summarize according to the access times synchronized by the dispatching center node, namely, locally counts the total access times of the edge node group to the resource in a preset time through the first edge node, for example, sums the access times of all the edge nodes in the edge node group to the resource in 5 minutes, so that the edge node can obtain the total access times of the edge node group to the resource through self statistics.
It should be noted that, the dispatching center node obtains the access times of the resource in each edge node, and may count the access times of all the edge nodes in each area for the resource according to a preset statistics period (for example, 1 minute), and synchronize data with all the edge nodes in the corresponding area. In addition, the edge node may not synchronize data to each edge node in the corresponding area, the edge node directly sends query information for obtaining the total access times of the edge node group to the resource to the dispatching center node, the query information at least includes duration of preset time, a client identifier (or an area to which the client belongs) and a resource identifier, the dispatching center node determines the edge node group corresponding to the area to which the client belongs according to the client identifier (or the area to which the client belongs) in the query information, counts the sum value of the access times of each edge node in the edge node group to the resource in the preset time, and then sends the sum value obtained by statistics to the edge node, so that the edge node obtains the total access times of the edge node group to the resource from the dispatching center node.
The preset time may be the first 5 minutes, the first 10 minutes, etc. taking the current time of receiving the user resource request as the end point, and the statistical period, the synchronization period, and the duration of the preset time are not particularly limited herein.
Specifically, in one embodiment of the present invention, in step 104, the first edge node determines a second edge node, including: the first edge node determines a resource identifier according to the resource request; the first edge node performs consistent hash calculation on the resource identifier to generate a hash value of the resource, wherein the resource identifier comprises a uniform resource locator or a domain name; the first edge node calculates hash values of all or part of edge nodes in the area where the first edge node is located, and the hash values of all the edge nodes are distributed on a consistent hash ring; and the first edge node determines a corresponding second edge node on the consistent hash ring according to the hash value of the resource.
It should be noted that, the first edge node may obtain a resource identifier in the resource request, where the resource identifier may be a URL or a domain name, and according to the resource identifier, a hash value corresponding to the resource identifier, that is, a hash value corresponding to the resource, may be obtained by calculating a consistent hash algorithm, and for different resource identifiers, different hash values may be obtained by calculating, so that a one-to-one correspondence may be provided between the resource identifier and the hash value, and then, by calculating hash values of IP addresses of all or part of edge nodes in the edge node group, hash values corresponding to each edge node, that is, hash values of each edge node, and distributing hash values of each edge node on the consistent hash ring; on the consistent hash ring, searching and searching positions corresponding to the hash values of the IP addresses of all the edge nodes along a preset direction from the hash value positions of the resources, and determining the edge node represented at the hash value position of the searched first edge node IP address as a second edge node. The client sends an adjusted resource request to a second edge node determined according to the resource identification, and when the second edge node has the resource, the resource is returned to the client; and when the second edge node does not have the resources, acquiring the resources to the upper node or the source station.
In one embodiment of the invention, the second edge node is positioned through the consistent hash algorithm, so that the second edge node can be accessed each time the same first type resource is accessed, the hit rate of the resource at the edge node is high, the source return rate is effectively reduced, the access of the edge node is more concentrated, the bandwidth of a parent is reduced, and the user experience effect is better.
In one embodiment of the present invention, after the first edge node determines the second edge node, the first edge node may record the second edge node, and when a resource request for accessing the same resource is received again and the resource is a first type resource, the first edge node may directly return a response message containing the recorded address information of the second edge node to the client according to the recorded information. By recording the information of the second edge node, the time length for determining the second edge node can be saved, and the efficiency of obtaining the request resource by the client is improved.
Specifically, in one embodiment of the present invention, in step 104, the first edge node returns a first response message of the resource request to the client, including: acquiring a resource identifier in a resource request and address information of a second edge node; and the first edge node generates a first response message of the resource request according to the resource identification and the address information, and returns the first response message to the client.
In practical application, when the first edge node determines that the resource requested by the user is a first type resource, a first response message may be constructed according to the acquired URL and address information of the second edge node, and the first edge node sends the first response message to the client, so that the client receives the first response message and then sends the adjusted resource request to the second edge node, and further the client can acquire the resource requested by the user through the second edge node, where the address information of the second edge node may be an IP address of the second edge node, where the first response message may carry an HTTP status code 30X, and when the status code is 30X, indicates that the client is instructed to resend a request, and the first edge node sends a response header Location to specify the URL address of the new request.
The second edge node and the first edge node belong to the same logic area, for example, may be a geographic area or an operator.
In one embodiment of the invention, a first edge node receives a resource request of a client, and when judging that the resource requested by a user does not exist (miss) in the first edge node, the first edge node judges the resource type of the resource requested by the user according to the resource request, when judging that the resource requested by the user is the first type of resource, determines a second edge node according to the resource identifier of the resource, and then sends a response message of the resource request to the client, and the client sends the adjusted resource request to the second edge node according to the response message, so that the client can acquire the resource requested by the user through the second edge node in the same geographic area, when the resource requested by the user belongs to the first type of resource with low access heat in the first edge node, the client is instructed to send the adjusted resource request to other edge nodes with the resource requested by the user, the parent cost is reduced, the hit rate of the cold resource in the edge node is improved, the access delay caused by the internal consumption bandwidth and the performance of the parent node is reduced, and simultaneously, the access rate of the resource requested by the client and the other edge nodes in the same area can be improved.
In one embodiment of the present invention, in step 104, the first edge node determines a second edge node, and further includes determining the second edge node according to a load condition of each edge node in the edge node group where the first edge node is located. The first edge node screens the edge node with lower load according to the load condition of each edge node in the edge node group, determines the edge node as a second edge node, sends response information carrying the address information of the second edge node to the client, sends a resource request according to the address information of the second edge node, and can quickly respond to the resource request of the user by screening the second edge node with lower load, so that the response speed and success rate of the resource request of the user are improved, and the use experience of the user is improved. When the edge node with lower load is selected to have no resource, the second edge node acquires the resource through the upper layer node or the source station and sends the resource to the client. In this embodiment, the edge node may also determine the bandwidth condition of the machine, the quality data such as CPU, IO, packet loss rate, etc. instead of the load condition, and perform the determination and screening of the target edge node.
In one embodiment of the present invention, the first response message is used to instruct the client to send the adjusted resource request to the second edge node, so that the second edge node returns the resource requested by the adjusted resource request to the client. That is, after the client sends the adjusted resource request to the second edge node according to the first response message, the client receives the resource requested by the adjusted resource request returned by the second edge node, where the resource is a resource having a key frame position closest to the system time of the adjusted resource request reaching the second edge node as a starting position. In a live broadcast scene, after a main broadcasting terminal starts live broadcasting, the main broadcasting terminal can push live broadcast video data to an edge node in real time, when a user's resource request reaches a second edge node, in order to ensure that the user can accurately acquire video resources of corresponding time when the user arrives, the second edge node can push a key frame position closest to the system time of the resource request reaching the second edge node as a resource of a starting position to a client, so that the user can timely watch clear live broadcast stream contents without generating a screen and a clip.
According to a large amount of experimental data, the method provided by the embodiment of the invention is utilized to carry out resource requests, so that the probability of missing at the edge node is low, and for the same first type resource, in N areas, when the first edge node is missed, the first edge node is father-back or source-back N times at most, the father-back or source-back bandwidth of 15-20% is effectively reduced, and the edge node for processing requests of different resource types is reassigned and adjusted by judging and deciding the processing mode of the edge node, so that the utilization efficiency of the CDN edge node can be greatly improved.
Fig. 2 schematically shows a block diagram of an apparatus for resource request processing according to the invention.
As shown in fig. 2, there is provided an apparatus for processing a resource request, which is applied to a first edge node of a content distribution network, the apparatus comprising:
A receiving module 201, configured to receive a resource request of a client;
a judging module 202, configured to judge whether a resource requested by the resource request exists at the first edge node; when no resource exists, the judging module 202 judges the type of the resource;
A determining module 203, configured to determine, when the judging module 202 judges that the resource is a first type resource, the determining module 203 determines a second edge node;
The response module 204 is configured to, when the determining module 202 determines that the resource is a first type resource, return a first response message of the resource request to the client, where the first response message is used to instruct the client to send the adjusted resource request to the second edge node, and the first response message of the resource request returned by the response module 204 to the client includes address information of the second edge node;
the response module 204 is further configured to, when the determining module 202 determines that the resource is a second type of resource, obtain the resource from an upper node or a source station by the response module 204 and return the resource to the client.
The judging module 202 is specifically configured to:
When the access times of the resources in the preset time are smaller than a first preset threshold value corresponding to the address information contained in the resource request, judging that the resources are of a first type;
and when the access times of the resources in the preset time are greater than or equal to a first preset threshold value corresponding to the address information contained in the resource request, judging that the resources are the second type resources.
The access times of the resources in the preset time comprise:
the access times of the resources in the preset time and the first edge node, and/or the total access times of the resources in the preset time and the edge node group in the area of the client.
The first preset threshold is set according to historical access conditions of address information contained in the resource request on the first edge node, and/or according to historical access conditions of address information contained in the resource request on an edge node group in an area where the client is located.
Wherein the determining module 203 is further configured to,
The determining module 203 determines a resource identifier according to the resource request;
the determining module 203 performs consistent hash calculation on the resource identifier to generate a hash value of the resource, wherein the resource identifier comprises a uniform resource locator or a domain name;
the determining module 203 calculates hash values of all or part of edge nodes in the area where the first edge node is located, and distributes the hash values of all the edge nodes on the consistent hash ring;
the determining module 203 determines a corresponding second edge node on the consistent hash ring according to the hash value of the resource.
Wherein the response module 204 is further configured to,
The response module 204 records the second edge node, and when the resource request for accessing the same resource is received again and the resource is a first type resource, the response module 204 returns a first response message of the resource request to the client, including the recorded address information of the second edge node.
Wherein the determining module 203 is further configured to,
The determining module 203 determines the second edge node according to the load condition of each edge node in the edge node group where the first edge node is located.
Wherein the judging module 202 is further configured to,
The determining module 202 determines whether the first edge node load is greater than or equal to a second preset threshold;
if not, the determination module 202 determines the resource type of the resource.
Wherein, if the determination module 202 determines that it is yes,
The determining module 203 is further configured to determine a third edge node;
The response module 204 is further configured to, when the judgment module 202 judges yes, return, by the response module 204, a second response message of the resource request to the client; the second response message is used for indicating the client to send the adjusted resource request to the third edge node.
Wherein the response module 204 is configured to,
In the case where the determination module 202 determines that the resource exists at the first edge node, the response module 204 returns the resource directly to the client.
The first response message is used for indicating the client to send the adjusted resource request to the second edge node, so that the second edge node returns the resource requested by the adjusted resource request to the client, and the resource is the resource which is the key frame position closest to the system time of the adjusted resource request reaching the second edge node and is used as the starting position.
An embodiment of the present invention provides a computer device, including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute the executable instructions in the memory to implement the method of resource request processing described above.
Fig. 3 is a block diagram illustrating a computer device 300 for a resource request processing method, according to an example embodiment. For example, the computer device 300 may be provided as a server. Referring to fig. 3, a computer device 300 includes a processor 301, the number of which may be set to one or more as desired. The computer device 300 further comprises a memory 302 for storing instructions, such as application programs, executable by the processor 301. The number of the memories can be set to one or more according to the requirement. Which may store one or more applications. The processor 301 is configured to execute instructions to perform the steps of the resource request processing method described above.
The embodiments of the present invention also provide a non-transitory computer-readable storage medium including instructions, having stored thereon executable instructions that, when executed by a processor, implement a method of resource request processing as described above. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
It will be apparent to those skilled in the art that embodiments of the present invention may be provided as a method, apparatus (device), or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein. Computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, including, but not limited to RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (devices) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in an article or apparatus that includes the element.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (20)
1. A method of resource request processing applied to a first edge node of a content distribution network, the method comprising:
The first edge node receives a resource request of a client;
The first edge node judges whether the resource requested by the resource request exists in the first edge node or not;
when the resource does not exist, the first edge node judges the type of the resource;
When the resource is a first type resource, determining a second edge node by the first edge node, wherein the first edge node returns a first response message of the resource request to the client, and the first response message is used for indicating the client to send an adjusted resource request to the second edge node, and the first response message of the first edge node returning the resource request to the client comprises address information of the second edge node;
When the resource is a second type resource, the first edge node acquires the resource from an upper node or a source station and returns the resource to the client;
Before the first edge node judges the type of the resource, the method further comprises: when the load of the first edge node is larger than or equal to a second preset threshold value, the first edge node determines that a third edge node with the resource requested by the resource request exists in the area of the first edge node according to the resource identifier of the resource request, and sends a second response message containing the address information of the third edge node to the client, so that the client can send an adjusted resource request to the third edge node according to the second response message; when the load of the first edge node is smaller than a second preset threshold value, the first edge node continues to judge the resource type of the resource.
2. The method of claim 1, wherein the first edge node determining the type of the resource comprises:
When the access times of the resources in the preset time are smaller than a first preset threshold value corresponding to the address information contained in the resource request, judging that the resources are of a first type;
And judging the resource as the second type resource when the access times of the resource in the preset time are larger than or equal to a first preset threshold corresponding to the address information contained in the resource request.
3. The method of claim 2, wherein the number of accesses to the resource within the preset time comprises:
and the access times of the resource at the first edge node in the preset time and/or the total access times of the resource at the edge node group in the area where the client is located in the preset time.
4. The method of claim 2, wherein the first preset threshold is set according to a historical access condition of the first edge node to address information included in the resource request, and/or according to a historical access condition of the first edge node to address information included in the resource request.
5. The method of claim 1, wherein the first edge node determines a second edge node, comprising:
The first edge node determines a resource identifier according to the resource request;
The first edge node performs consistent hash calculation on the resource identifier to generate a hash value of the resource, wherein the resource identifier comprises a uniform resource locator or a domain name;
the first edge node calculates hash values of all or part of edge nodes in the area where the first edge node is located, and the hash values of all the edge nodes are distributed on a consistent hash ring;
and the first edge node determines the corresponding second edge node on the consistent hash ring according to the hash value of the resource.
6. The method of claim 1, wherein after determining a second edge node by the first edge node, further comprising:
And the first edge node records the second edge node, and when the resource request for accessing the same resource is received again and the resource is a first type resource, the first edge node returns a first response message of the resource request to the client side, wherein the first response message comprises the recorded address information of the second edge node.
7. The method of claim 1, wherein the first edge node determines the second edge node, further comprising:
And determining the second edge node according to the load condition of each edge node in the edge node group where the first edge node is located.
8. The method of claim 1, wherein the method further comprises:
And directly returning the resource to the client under the condition that the resource exists in the first edge node.
9. The method of claim 1, wherein the first response message is used to instruct the client to send an adjusted resource request to the second edge node, such that the second edge node returns to the client a resource requested by the adjusted resource request, the resource being a resource that is at a starting location that is a key frame location closest to a system time at which the adjusted resource request arrives at the second edge node.
10. An apparatus for processing a resource request, for application to a first edge node of a content distribution network, the apparatus comprising:
The receiving module is used for receiving the resource request of the client;
The judging module is used for judging whether the resource requested by the resource request exists in the first edge node or not; when the resource does not exist, the judging module judges the type of the resource;
The determining module is used for determining a second edge node when the judging module judges that the resource is a first type resource;
The response module is used for returning a first response message of the resource request to the client when the judging module judges that the resource is a first type resource, wherein the first response message is used for indicating the client to send an adjusted resource request to the second edge node, and the first response message of the resource request returned to the client by the response module comprises address information of the second edge node;
The response module is further configured to, when the judging module judges that the resource is a second type resource, acquire the resource from an upper node or a source station and return the resource to the client:
The response module is further configured to, when the load of the first edge node is greater than or equal to a second preset threshold, determine, according to the resource identifier of the resource request, that a third edge node having the resource requested by the resource request in the area to which the first edge node belongs, send a second response message including address information of the third edge node to the client, so that the client may send the adjusted resource request to the third edge node according to the second response message; and when the load of the first edge node is smaller than a second preset threshold value, the judging module continues to judge the resource type of the resource.
11. The apparatus of claim 10, wherein the judging module is specifically configured to:
When the access times of the resources in the preset time are smaller than a first preset threshold value corresponding to the address information contained in the resource request, judging that the resources are of a first type;
And judging the resource as the second type resource when the access times of the resource in the preset time are larger than or equal to a first preset threshold corresponding to the address information contained in the resource request.
12. The apparatus of claim 11, wherein the number of accesses to the resource within the preset time comprises:
and the access times of the resource at the first edge node in the preset time and/or the total access times of the resource at the edge node group in the area where the client is located in the preset time.
13. The apparatus of claim 12, wherein the first preset threshold is set according to a historical access condition of the first edge node to address information included in the resource request, and/or according to a historical access condition of the first edge node to address information included in the resource request.
14. The apparatus of claim 10, wherein the determining module is further configured to,
The determining module determines a resource identifier according to the resource request;
the determining module performs consistent hash calculation on the resource identifier to generate a hash value of the resource, wherein the resource identifier comprises a uniform resource locator or a domain name;
the determining module calculates hash values of all or part of edge nodes in the area where the first edge node is located, and distributes the hash values of all the edge nodes on a consistency hash ring;
And the determining module determines the corresponding second edge node on the consistent hash ring according to the hash value of the resource.
15. The apparatus of claim 10, wherein the response module is further configured to,
And the response module records the second edge node, and when the resource request for accessing the same resource is received again and the resource is a first type resource, the response module returns a first response message of the resource request to the client side, wherein the first response message comprises the recorded address information of the second edge node.
16. The apparatus of claim 10, wherein the determining module is further configured to,
The determining module determines the second edge node according to the load condition of each edge node in the edge node group where the first edge node is located.
17. The apparatus of claim 10, wherein the response module is configured to,
And under the condition that the judging module judges that the resource exists in the first edge node, the response module directly returns the resource to the client.
18. The apparatus of claim 10, wherein the first response message is to instruct the client to send an adjusted resource request to the second edge node to cause the second edge node to return to the client a resource requested by the adjusted resource request, the resource being a resource that is a starting location from a key frame location closest to a system time the adjusted resource request arrived at the second edge node.
19. A computer device comprising a processor, a memory and a computer program stored on the memory, characterized in that the processor implements the steps of the method according to any of claims 1-9 when the computer program is executed.
20. A computer readable storage medium having stored thereon executable instructions, which when executed by a processor, implement the steps of the method according to any of claims 1-9.
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